Use the code for creating or attaching new storage source in the
snapshot code and switch to 'blockdev-snapshot' for creating the
snapshot itself.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
With blockdev we'll be able to support protocols which are not supported
by the storage backends in libvirt. This means that we have to be able
to skip the creation and relative storage path reading if it's not
supported. This will make it impossible to use relative backing for
network protocols but that would be almost insane anyways.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
After we always assume support for the 'transaction' command
(c358adc571) and follow-up cleanups
qemuDomainSnapshotCreateSingleDiskActive lost its value. Move the code
into appropriate helpers and remove the function.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Fix and unify the naming of external snapshot preparation functions.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Make qemuDomainSnapshotDiskDataCleanup cleanup section friendly by
moving the error preservation code inside it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We changed to always saving the status and config XMLs to simplify
code. After a few more refactors it's now possible to move it to the
appropriate place and save the XMLs only on success again.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When we take a snapshot we must properly remove our locking
infrastructure locks. This was broken by commit 3817fa10c4 which
attempted to properly track the readonly state for the image as the
locking code was executed after this change. Since we forced the image
which was locked as read-write to read-only prior to unlocking it the
write lock was not dropped.
Fix it by moving the locking code prior to modifying the readonly flag.
https://bugzilla.redhat.com/show_bug.cgi?id=1745618
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The code preparing data for creating/attaching the target image of block
copy didn't use the correct reference to the existing backing chain in
case when the copy should inherit it. This meant that qemu actually
opened a second copy of the chain and operated on that.
This would de-sync qemu from libvirt's view of node names. Luckily this
is only hypothetical at this point since it happens only when -blockdev
is enabled.
Fix it by passing 'mirrorBacking' which has the proper data as the
backing store when calling
qemuBuildStorageSourceChainAttachPrepareBlockdevTop.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In some cases we'll need to pass in a backing store which is not
recorded as the backing store of @src. Export backingStore as variable
and fix all callers to pass in the backing store. No semantic changes
for now.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Pass backing store as an argument rather than extracting it locally and
fix the callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Extract the loop and supporting infrastructure to the caller as only one
of the two callers actually cares about looping and rename the helper to
qemuBuildStorageSourceChainAttachPrepareBlockdevOne.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Pass in backing store explicitly to qemuBlockStorageSourceGetBlockdevProps
and fix the callers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Move all bits of the formatting of the 'backing' attribute to a single
condition and make it use a single extracted copy of the backing store.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Since libvirt stores the backing chain into the XML in a nested way it
is the prime possibility to hit libxml2's parsing limit of 256 layers.
Introduce code which will crawl the backing chain and verify that it's
not too deep. The maximum nesting is set to 200 layers so that there's
still some space left for additional properties or nesting into snapshot
XMLs.
The check is applied to all disk use cases (starting, hotplug, media
change) as well as block copy which changes image and snapshots.
We simply report an error and refuse the operation.
Without this check a restart of libvirtd would result in the status XML
failing to be parsed and thus losing the VM.
https://bugzilla.redhat.com/show_bug.cgi?id=1524278
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
With blockdev we must issue the block_set_io_throttle QMP command to
setup disk throttling as we currently can't do it with the 'throttle'
layer.
Unfortunately there's nothing we can do if it fails.
https://bugzilla.redhat.com/show_bug.cgi?id=1733163
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When virtlogd is used to capture QEMU's stdout, qemuDomainObjTaint would
always fail to write the message to the log file when QEMU is already
running (i.e., outside qemuProcessLaunch). This can happen during device
hotplug or by sending a custom QEMU guest agent command:
warning : qemuDomainObjTaint:8757 : Domain id=9 name='blaf'
uuid=9cfa4e37-2930-405b-bcb4-faac1829dad8 is tainted:
custom-ga-command
error : virLogHandlerDomainOpenLogFile:388 : Cannot open log file:
'/var/log/libvirt/qemu/blaf.log': Device or resource busy
error : virNetClientProgramDispatchError:172 : Cannot open log file:
'/var/log/libvirt/qemu/blaf.log': Device or resource busy
The fix is easy, we just need to use the right API for appending a
message to QEMU log file instead of creating a new log context.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The 'u' modifier creates an unsigned int JSON attribute but the disk size
and capacity fields are unsigned long long. If the size of the created
image would be more than 4GiB we'd overflow and create sub-4G image.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
A specially crafted XML which would reference a non-existing disk but
request the mirror to be registered with the blockjob could potentially
make the parser dereference NULL. Fix it by moving the code slightly and
just treat it as a wrong job XML. Found by Coverity.
Reported-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
If a block job reaches failed/cancelled state, or is completed
without pivot then we must remove security driver metadata
associated to the backing chain so that we don't leave any
metadata behind.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1741456
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
ACKed-by: Peter Krempa <pkrempa@redhat.com>
When a block job is completed, the security image metadata are
moved to the new image. If this fails an warning is printed, but
the message contains only domain name and lacks image paths. Put
them both into the warning message.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
ACKed-by: Peter Krempa <pkrempa@redhat.com>
Currently, there are only a few lines of code so a separate
function was not necessary, but this will change. So instead of
putting all the new code under 'case
QEMU_BLOCKJOB_TYPE_ACTIVE_COMMIT' create a separate function.
Just like every other case has one.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
ACKed-by: Peter Krempa <pkrempa@redhat.com>
Coverity noted that 'reply' can be NULL after calling
qemuAgentCommand(). Avoid dereferencing reply in
qemuAgentErrorComandUnsupported() in that case.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
'virQEMUDriverConfigPtr cfg' is declared, initiated, but never
used in virQEMUDriverCreateCapabilities().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Christophe de Dinechin <dinechin@redhat.com>
As qemu documents we should use everything in the 'props' sub-object of
the data returned by query-hotpluggable-cpus. Until now we only used
everything we recognized, but that may break in cases when qemu
introduces new fields.
This change requires a fix to the test data as some fields were
reordered.
https://bugzilla.redhat.com/show_bug.cgi?id=1741658
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
In addition to the data that libvirt needs and extracts internally,
copy and store the whole 'props' JSON sub-object of the data returned by
query-hotpluggable-cpus for future use.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
On error paths, info_ret could potentially leak. Make sure it's freed.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
When we're collecting guest information, older agents may not support
all agent commands. In the case where the user requested all info
types (i.e. types == 0), ignore unsupported command errors and gather as
much information as possible. If the agent command failed for some other
reason, or if the user explciitly requested a specific info type (i.e.
types != 0), abort on the first error.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Add support to specify a boot order on vfio-ccw passthrough devices.
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Bjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Refactoring the method signatures in preparation for
checking boot index of the mediated devices.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Bjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Changing the error messages to report the problem encountered.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Bjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Moving the hostdev boot support validation from the command line
generator code into the domain validation code.
Reviewed-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Bjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Introduced in v3.0.0-rc1~336, the commit message doesn't really
justifies the expensive domain def copy creation. Now, that
vm->def is guarded in this function by job acquirement we can use
vm->def directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
These two functions work with vm->def in their critical sections
(i.e. after the job was acquired and before it is released). But
that means, they need QUERY domain job too to prevent vm->def
change.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
All code using LOCALSTATEDIR "/run" is updated to use RUNSTATEDIR
instead. The exception is the remote driver client which still
uses LOCALSTATEDIR "/run". The client needs to connect to remote
machines which may not be using /run, so /var/run is more portable
due to the /var/run -> /run symlink.
Some duplicate paths in the apparmor code are also purged.
There's no functional change by default yet since both expressions
expand to the same value.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Creating various directories using $(runstatedir) instead of
$(localstatedir)/run.
There's no functional change by default yet since both expressions
expand to the same value.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The recent cleanups allow us to clean up the code a bit.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
That way devstr will only be used for the device string.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Instead of getting the string then passing it to virCommand.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use separate variables for the chardev and the device.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reduce the scope of the variable to get it freed for every controller
processed.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
